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`vtable for xx' に対する定義されていない参照です

Posted at

仮想関数が宣言されているのに定義されていないと出る。
リンカエラーかつ間接的なのでワケワカになりやすい。
仮想関数をオーバーライドした子クラスでも起きる。

:exsample.cc
class OYA{
  virtual void Hoge();
...
};

class KO : public OYA{
  void Hoge();
};

とやった時に、OYA::Hoge()が定義されていなくてもKO::Hoge()が定義されていなくても起きる。

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